ToneMerc wrote:Not really, take #004 basic topology and spin it this way:
1. Adjustable 2nd Gen OD network
2. Low PI plates
3. 4th Gen classic tone stack
4. Piher CF on cathodes like seen in the Overdrive Deluxe
TM
Adj FET I see also ...820 ohm NFB, 390ohm/1uf Tant?
Man this build looks really nice...oozing NOS, anxious to here how it compares to your other builds.
These quad 6v6 builds just sound killer, the increased gain from the pwr amp when these amps are loud seem to have a positive effect on the sound of the amp, especially the cleans.
Darin, orginally I had it mocked up with a 820 ohm, 100 ohm shunt , 2.2uf and a 500 ohm pot. However, #004 supposely has a 8.2K, 1K with an accent switch AFAIK. I've since changed the pot to 2K and will decide on either 8.2k/1k/1uF, 3.3K/390/1uF or possibly 1.8K/220/.68uF if I want to dump lots of NFB.
CHIP wrote:Very nice build, TM. What make are the blue bypass caps?
I always keep an eye out for NOS parts, but it tends to be a difficult search.
Thanks CHIP, they are Phillips all the way around. I'm always searching for parts and it is very time consuming. Now the way I do heavy NOS builds is to plan them at least 6-12 months out. It's kind of similar to procuring parts for a classic car, only there isn't a Year One repro parts equivalent for resistors and capacitors so you have to be very, very patient. Some of these resistors I grabbed back in 08' or 09' IIRC.
Structo wrote:Nice!
I'll be interested in your thoughts about the difference in coupling caps and how they compare to the 6PS orange drops.
Are the brown ones mylar/ polyester?
Thanks Tom; those two EM brown PI caps with the sliver marking are the exact same paper/poly composition as the early Sprague 6PS. I have no idea about the CDE brown turds and actually never bothered to research the makeup. However, I'm hoping that they don't sound like doo doo.
TM
Great Job on the build..The Brown CDE's are fairly similar to the early 6PS caps from what I get from them..They are smooth slightly darker (hand in hand) but a bit less on the open mid range sound stage as the PS's..
That amp should sound sweet!!..
IMO on some of these early designs less is more on GNFB.. Looking forward to some clips..
Merry Christmas!!
T
" The psychics on my bench is the same as Dumble'"
talbany wrote:TM
Great Job on the build..The Brown CDE's are fairly similar to the early 6PS caps from what I get from them..They are smooth slightly darker (hand in hand) but a bit less on the open mid range sound stage as the PS's..
That amp should sound sweet!!..
IMO on some of these early designs less is more on the GNFB.. Looking forward to some clips..
Merry Christmas!!
T
Thanks Tony, it was a toss up between 8.2K/1K or 4.7K/390. I ended going with 4.7k/390/1uf in the GNFB/Pres chain.
Merry Christmas as well, we might have to get together soon.
Mike
Last edited by ToneMerc on Wed Dec 21, 2011 8:09 pm, edited 1 time in total.
boldaslove6789 wrote:Looks great! Shoul sound just as good too!
These quad 6v6 builds just sound killer, the increased gain from the pwr amp when these amps are loud seem to have a positive effect on the sound of the amp, especially the cleans.
Totally agree on that! The ONE that i`ve done has been practically immortalized when compared to the others!
, yes I did.
